Date: Wed, 17 Dec 2008 01:02:47 +0100 From: "Paul B. Mahol" <onemda@gmail.com> To: current@freebsd.org Subject: panic in syscons Message-ID: <3a142e750812161602k54486e2bu5ceff696fc03adef@mail.gmail.com>
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Hi
I got strange panic when swithching two vtys several times in short
interval (recently I'm full of various stupid ideas ;-)
db:0:kdb.enter.unknown> run lockinfo
db:1:lockinfo> show locks
db:1:locks> show alllocks
Process 697 (moused) thread 0xc3fff000 (100041)
Process 11 (intr) thread 0xc3d7e900 (100026)
db:1:alllocks> show lockedvnods
Locked vnodes
db:0:kdb.enter.unknown> show pcpu
cpuid = 0
curthread = 0xc3d7e900: pid 11 "irq1: atkbd0"
curpcb = 0xc3a22d90
fpcurthread = none
idlethread = 0xc3cfdb40: pid 10 "idle: cpu0"
APIC ID = 0
currentldt = 0x50
spin locks held:
db:0:kdb.enter.unknown> bt
Tracing pid 11 tid 100026 td 0xc3d7e900
sc_switch_scr(c0811480,2,1,0,1,...) at sc_switch_scr+0x22c
scgetc(c068c1b0,0,c0617736,26b,c04faaad,...) at scgetc+0x619
sckbdevent(c07fb3c0,0,c0811480,c068c1b0,8,...) at sckbdevent+0x224
atkbd_intr(c07fb3c0,0,c3a22cc8,c04a016f,c07fb3c0,...) at atkbd_intr+0x8a
atkbdintr(c07fb3c0,0,c061c876,46d,c3cfa238,...) at atkbdintr+0x21
intr_event_execute_handlers(c3cfba90,c3cfa200,c061c876,4dd,c3cfa270,...)
at intr_event_execute_handlers+0x10f
ithread_loop(c3e56970,c3a22d38,c061c5cc,32d,c3cfba90,...) at ithread_loop+0x98
fork_exit(c04a0cbf,c3e56970,c3a22d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xc3a22d70, ebp = 0 ---
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0xd33f6a20
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc04638bc
stack pointer = 0x28:0xc3a22bc0
frame pointer = 0x28:0xc3a22be4
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 11 (irq1: atkbd0)
exclusive sleep mutex Giant (Giant) r = 1 (0xc068c1b0) locked @
/usr/src/sys/dev/syscons/syscons.c:619
shared sx filedesc structure (filedesc structure) r = 0 (0xc3fd2b2c)
locked @ /usr/src/sys/kern/sys_generic.c:958
exclusive sleep mutex Giant (Giant) r = 1 (0xc068c1b0) locked @
/usr/src/sys/dev/syscons/syscons.c:619
--
Paul
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